I'm not a huge fan of mind control stories, because of this very issue, but I think King's definitely playing with that idea with some, if not all of the characters involved!
I don't know much about Booster other than 52, honestly, but the Booster from the first half of that series would definitely be up for it!
Well, we know that Bane ordered Psycho Pirate to manipulate him so he didn't need Venom anymore. So we'll have to see if Psycho Pirate played Bane as well for his own purposes. I think that would be pretty nifty - though Psycho Pirate is kind of a blank slate in terms of his personality and motivations right now in King's run.
I honestly prefer the way King's going to the way Morrison's going. There's a sense of reality and sympathy in Bane's plans, that I never got in Simon Hurt and the Black Glove. But that could be because Morrison leaned much more heavily on mind control/supernatural/drug manipulation than King is so far.
I'm really curious to see when Batman or Catwoman will realize what's going on with Bane. King mentioned Daredevil: Born Again, the perfect moment where Matt says, "Perfect crime. You shouldn't have signed it." I really hope we get a moment like that, where Bane overplays his hand, and Batman realizes that Bane's signing his work. Maybe that's part of the upcoming KGBeast arc?